Doors Open Ottawa

Doors Open Ottawa is an annual event held in the City of Ottawa, Ontario, Canada, that gives the public access to many of the city's unique and historically significant buildings. Among the buildings included are government offices, museums, radio stations, places of worship, embassies, and historical landmarks. It is the second-oldest Doors Open Days event in North America; only Doors Open Toronto is older.

Admission is free of charge. Doors Open Ottawa has recorded nearly 850,000 visits since it began in 2002.